Seedless table grape named ‘ARRATHIRTYTWO’

ABSTRACT

A new distinct variety of grapevine named ‘ARRATHIRTYTWO’ abundantly forms attractive large firm seedless berries with an attractive black skin coloration; in medium-to-large clusters which display a naturally sweet flavor. The fruit commonly is ready for harvesting during August in the San Joaquin Valley of Central California, U.S.A, and displays good eating qualities as a table grape. The fruit firmness renders the fruit well amenable for handling, shipping, and storage.

Classification: The present invention relates to a new Vitis viniferaGrapevine.

Variety denomination: The new Grapevine has the varietal denomination‘ARRATHIRTYTWO’.

BACKGROUND OF THE INVENTION

A breeding program was initiated during the late 1990's near Bakersfieldin the San Joaquin Valley of Central California. In 2008, during thisbreeding program, a new variety of Vitis vinifera was created bydeliberate cross breeding of two parent plants by emasculation of thepollen bearing organ of the female and introducing pollen from anothermale origin. The female parent of the new variety was BAR1 which is amedium-sized black seedless grape variety with a crisp texture and anatural flavor (non-patented in the United States). The male parent(i.e. the pollen parent) of the new variety was 35-22+4, a mid-season,black variety with a meaty and juicy texture (non-patented in the UnitedStates).

Comparison of ‘ARRATHIRTYTWO’ with its parents:

TABLE 1 Summer Royal BAR1 35-22+4 (Comparison ARRATHIRTYTWO (Mother)(Father) Variety) Berry Very good Very good Medium Good attachment Berrysize 20-22 18-22 18 18-20 Bunches 48 32 32 42 per vine Bunch LooseMedium Loose Slightly loose Density

The parentage of the new variety can be summarized as follows:BAR1×35-22+4

An artificial pollination was created, and the result was an embryowhich possessed unique genetic qualities. The rudiments resulting fromthe above pollination were embryo rescued.

In 2010 the plant was transplanted to Bakersfield in the San JoaquinValley of Central California.

It was found that the new grapevine of the present invention possessesthe following combination of characteristics:

(a) forms attractive large firm seedless berries with a black skincoloration; in medium-to-large clusters which display a naturally sweetflavor;

(b) commonly bears fruit during the month of August in the San JoaquinValley of Central California, U.S.A.; and

(c) bears fruit that is firm and is well amenable for storage, handling,and shipping.

The new variety during observation to date has displayed no visibledisease, and has displayed an ability to well resist cold, drought,heat; but sensitive to direct exposure to sun and wind. The fruit of thenew variety has been found to display excellent handling and shippingqualities combined with desirable dessert eating qualities.

The new variety of the present invention has been found to undergoasexual propagation beginning in 2010 near Bakersfield in the SanJoaquin Valley of Central California, U.S.A. by grafting on matureThompson rootstock (non-patented in the United States). Such asexualpropagation has been conducted thereafter in successive years through2011, and has shown that the characteristics of the new variety arestrictly transmissible from one generation to another. Accordingly, thenew variety undergoes asexual propagation in a true to type manner.

SUMMARY OF THE INVENTION

The new variety ‘ARRATHIRTYTWO’ is a large size, black seedless tablegrape with a medium-high production, e.g., about 48 bunches per vine,and an average of about one to two bunches per shoot.

Asexual reproduction by micro propagation of the new variety asperformed near Bakersfield, Calif., U.S.A., shows that the forgoing andother distinguishing characteristics come true to form and areestablished and transmitted through succeeding propagations.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying photographic illustration shows typical specimens ofvegetative growth of six year old specimens of the new variety, in coloras nearly true as it is reasonably possible to make in a colorillustration of this character. Colors in the photograph may differ fromthe color values cited in the detailed botanical description below,which accurately describes the colors of the new Grapevine.

FIG. 1 shows leaves, stems and grapes of ‘ARRATHIRTYTWO’.

DETAILED BOTANICAL DESCRIPTION

The chart used in the identification of colors is The R.H.S. ColourChart of The ROYAL HORTICULTURAL SOCIETY 1995 edition. The descriptionis based on the observation of plants growing on ‘Thompson Seedless’rootstock outdoors near San Joaquin Valley of Central California, U.S.A.

-   Vine:    -   -   Vigor.—Vigorous upright shoots.        -   Productive capacity.—Bearing at a natural, average capacity,            spur pruning.        -   Trunk.—Strong and developed, ranges from 2″-2″⅜″, rough with            a fibrous, shaggy exterior; light maple brown coloring.-   Time of bud burst: March 5th in Bakersfield, Calif.-   Young shoot:    -   -   Openness of tip.—Slightly open.        -   Prostrate hairs on tip.—Sparse.        -   Anthocyanin coloration of prostate hairs on tip.—Weak.        -   Erect hairs on tip.—Sparse.-   Young leaf:    -   -   Color of upper side of blade.—Green with anthocyanin spots.        -   Prostrate hairs between main veins on lower side of            blade.—Sparse.        -   Erect hairs on main veins on lower side of blade.—Sparse.-   Shoot:    -   -   Attitude (before tying).—Semi-erect.        -   Color of dorsal side of internodes.—Green (yellow green            146-C).        -   Color of ventral side of internodes.—green (yellow green            146-C).        -   Color of dorsal side of nodes.—Green (yellow green 146-C).        -   Color of ventral side of nodes.—Green (yellow green 146-C).        -   Erect hairs on internode.—Sparse.        -   Length of tendrils.—Short (5.5″).        -   Color of tendrils.—Red (59-A) and green (145-B).        -   Number of tendrils.—5.-   Flower:    -   -   Sexual organs.—Fully developed stamens and fully developed            gynoecium.-   Mature leaf:    -   -   Size of blade.—7.5″×6″.        -   Shape of blade.—Ciruclar.        -   Blistering of upper side of blade.—Medium.        -   Number of lobes.—Five.        -   Depth of upper lateral sinuses.—Medium.        -   Arrangement of lobes of upper lateral sinuses (only            varieties with lobed leaves).—Slightly overlapped.        -   Arrangement of lobes petiole sinus.—Half open.        -   Length of teeth.—Medium.        -   Ratio length/width of teeth.—Medium.        -   Shape of teeth.—One side concave, one side convex.        -   Proportion of main veins on upper side of blade with            anthocyanin coloration.—Medium.        -   Prostrate hairs between main veins on lower side of            blade.—Sparse.        -   Erect hairs on main veins on lower side of blade.—Sparse.        -   Length of petiole compared to length of middle vein.—Equal.        -   Top side color.—Green (147-A).        -   Bottom side color.—Green (146-A).        -   Texture.—Smooth.        -   Vein color.—Green (137-C).        -   Petiole length.—4″.        -   Petiole color.—Green (146-C) with pink (57-A).-   Reproductive organs:    -   -   Color.—Green (138-A).        -   Size.—0.003150″.-   Time of beginning of ripening: July 10th in Bakersfield, Calif.-   Bunch:    -   -   Size (penduncle excluded).—Large.        -   Density.—Lax.        -   Length of penduncle primary bunch.—Medium.        -   Average bunch weight.—2 lbs.-   Berry:    -   -   Size.—Large.        -   Length.—1.4″.        -   Weight.—0.38 oz.        -   Diameter.— 14/16″.        -   Shape.—Narrow ellipsoid.        -   Color of skin (without bloom).—Blue black.        -   Ease of detachment from pedicle.—Difficult.        -   Thickness of skin.—Medium.        -   Anthocyanin coloration of flesh.—Medium.        -   Firmness of flesh.—Moderately firm.        -   Particular flavor.—None.        -   Formation of seeds.—None.        -   Market use of observed plant.—Fresh market.        -   Berries per bunch.—90-120.-   Woody shoot:    -   -   Main color.—Dark brown (grayed orange 164-A).-   Age and growing conditions: Six years growing under Y system in    South Joaquin Valley (hot, dry summers).-   Shipping characteristics: Number of days fruit has been stored under    specific conditions: fruit was in cold storage. Stored in poly bags    inside styrofoam boxes with sulphur pads. After 60 Days: rachises    were 75% green; 2% berry shuttering; no berry wrinkling or cracks    were apparent.

DNA PROFILE

To further characterize the new ‘ARRATHIRTYTWO’ variety DNA wasextracted from dried leaf samples and DNA profiles were obtained atCalifornia Seed & Plant Lab, California USA using base pairs for 8standard microsatellite DNA markers. The data is presented hereafter.

TABLE 2 Microsatellite DNA Marker Allele Sizes in Base Pairs M 1 234 240M 2 239 249 M 3 194 194 M 4 212 212 M 5 251 273 M 6 135 151 M 7 189 205M 8 257 259 M 9 212 214  M 10 247 261

The ‘ARRATHIRTYTWO’ variety has not been observed under all possibleenvironmental conditions to date. Accordingly, it is possible that thephenotypic expression may vary somewhat with changes in light intensityand duration, cultural practices, and other environmental conditions.

What is claimed is:
 1. A new and distinct variety of grapevine,botanically known as Vitis vinifera, identified as ‘ARRATHIRTYTWO’,substantially as shown and described herein.